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Marathon calendar Ontario 2025-2026

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Explore the best marathons in Ontario for 2025-2026! Our updated list features 16 exciting races across the region. Find your next race in Ontario below and join the running community at these great events!

February 2025
Feb
16
Sunday

Embrace Winter Run

3 km 5 km ... 21 km 42 km
April 2025
Apr
27
Sunday

Beneva Mississauga Marathon

5 km 10 km 21 km 42 km
May 2025
May
4
Sunday

Georgina Spring Fling

5 km 10 km 21 km 42 km
May
4
Sunday

Toronto Marathon

5 km 10 km 21 km 42 km
May
24-25
Sa - Su

Tamarack Ottawa Race Weekend

5 km 10 km 21 km 42 km
May
25
Sunday

SudburyROCKS Marathon

42 km
June 2025
Jun
21-22
Sa - Su

Community Strong Race

5 km 10 km 21 km 42 km
Jun
21
Saturday

Niagara Ultra

10 km 21 km 42 km 50 km
July 2025
Jul
5
Saturday

The Limberlost Challenge

Trail Run 7 km 14 km ... 42 km 56 km
Jul
19-20
Sa - Su

Xterra Conquer the Crater

Trail Run 5 km 10 km 21 km 42 km
September 2025
Sep
7
Sunday

Georgina Marathon

5 km 10 km 21 km 42 km
October 2025
Oct
5
Sunday

Muskoka Marathon

5 km 10 km 21 km 42 km
Oct
12
Sunday

Fall Colours Run

3 km 5 km ... 21 km 42 km
Oct
18-19
Sa - Su

Toronto Waterfront Marathon

5 km 21 km 42 km
Oct
26
Sunday

Niagara Falls Marathon

5 km 10 km 21 km 42 km
November 2025
Nov
1-2
Sa - Su

Hamilton Marathon Road2Hope

5 km 10 km 21 km 42 km
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